The right RV pump is gonna be based upon how much water flow and pressure you want in your system.if you’ve got a big RV,you’re gonna want a probably a bigger pump.If you got a small little class C,you’ll go with a smaller pump.
Most Whaleflo RV pumps come in either a 3.3GPM or a 5.0 GPM,and it’s typically either or so the smaller RVs,you’re gonna go with a smaller pump.